I think I've mentioned this before, but the new Miles Bootleg 4 got me thinking about it again. It's usually easy to find out when records were recorded but often more difficult to find out when they were released. This is particularly true of Miles's Prestige releases. So when the audience at the '55 Newport festival were surprised by Miles' playing, it may have been because they hadn't yet heard "Musings of Miles" or the session with Monk from December 24, '54. Similarly the '69 audience was probably surprised by the selections from Bitch's Brew when In a Silent Way had not yet been released. The release dates of the Columbia records are listed in the box sets but the Prestige recordings seem to have been released rather haphazardly often years after they were recorded. I've been able to find Downbeat reviews of some of them and presume that they're from around the release dates. Can anyone suggest a better source? And which is the correct possessive "Miles'" or "Miles's"?